diff --git a/2021/day07/aoc-c.c b/2021/day07/aoc-c.c
index a4b23cb..6fdb59c 100644
--- a/2021/day07/aoc-c.c
+++ b/2021/day07/aoc-c.c
@@ -1,4 +1,4 @@
-/* aoc-c: Advent2021 game, day 6 parts 1 & 2
+/* aoc-c: Advent2021 game, day 7 parts 1 & 2
  *
  * Copyright (C) 2021 Bruno Raoult ("br")
  * Licensed under the GNU General Public License v3.0 or later.
diff --git a/2021/day08/aoc-c.c b/2021/day08/aoc-c.c
index 0ee0698..ee1d1d0 100644
--- a/2021/day08/aoc-c.c
+++ b/2021/day08/aoc-c.c
@@ -1,4 +1,4 @@
-/* aoc-c: Advent2021 game, day 6 parts 1 & 2
+/* aoc-c: Advent2021 game, day 8 parts 1 & 2
  *
  * Copyright (C) 2021 Bruno Raoult ("br")
  * Licensed under the GNU General Public License v3.0 or later.
diff --git a/2021/day09/aoc-c.c b/2021/day09/aoc-c.c
index 2baa81c..787faa9 100644
--- a/2021/day09/aoc-c.c
+++ b/2021/day09/aoc-c.c
@@ -1,4 +1,4 @@
-/* aoc-c: Advent2021 game, day 6 parts 1 & 2
+/* aoc-c: Advent2021 game, day 9 parts 1 & 2
  *
  * Copyright (C) 2021 Bruno Raoult ("br")
  * Licensed under the GNU General Public License v3.0 or later.
diff --git a/2021/day10/aoc-c.c b/2021/day10/aoc-c.c
index 89a67ba..a2b0bc7 100644
--- a/2021/day10/aoc-c.c
+++ b/2021/day10/aoc-c.c
@@ -1,4 +1,4 @@
-/* aoc-c: Advent2021 game, day 6 parts 1 & 2
+/* aoc-c: Advent2021 game, day 10 parts 1 & 2
  *
  * Copyright (C) 2021 Bruno Raoult ("br")
  * Licensed under the GNU General Public License v3.0 or later.